檐口构造对四坡低矮房屋屋面风压分布影响规律的数值模拟研究  

NUMERICAL SIMULATION OF WIND PRESSURE DISTRIBUTION ON DIFFERENT CORNICE CONSTRUCTION OF LOW-RISE HIP ROOFED DUILDING

作　　者：戴益民[1] 邹思敏[1] 

机构地区：[1]湖南科技大学土木工程学院,湘潭411201

出　　处：《动力学与控制学报》2015年第5期394-400,共7页Journal of Dynamics and Control

基　　金：交通运输部重大科技项目(2011318824140);广西防灾减灾与结构安全重点实验室开放课题(2013ZDK 06);湖南省教育厅(13K088)资助项目~~

摘　　要：基于日本东京工艺大学风洞试验数据,针对低矮四坡房屋展开研究,验证了RNG模型对四坡低矮建筑表面风压研究的可靠性.利用此模型深度研究檐口外伸长度与出挑高度对四坡低矮屋面表面风压的影响规律.结果表明:檐口的长度及出挑高度对屋面风压影响明显,当檐口外伸长度不变,随檐口竖向高度增加,迎风面风吸力随之增大,当檐口竖向高度不变,高度为0.5m、1.0m时,随着檐口外伸长度的增加,迎风面负风压减小,檐口外伸长度为1.5m,竖向高度为1.0m为最有利于房屋表面抗风设计,结论可为台风多发地区低矮民居设计提供建议.Based on the data of wind tunnel test by Tokyo Polytechnic University,and validated RNG model hipped building surface pressure low reliability study. Study that cornice length and height of the influence on the low hipped roof surface wind pressure deeply. The results show that： The length and height of the cornice on the roof overhangs pressure affect apparently when cornice overhanging the same length,vertical height increases with cornice,windward wind suction increases,the vertical height unchanged when the cornice height of 0. 5m or 1.0m,with overhanging eaves to increase the length of the windward side of the negative air pressure decreases,the cornice overhang length of 1. 5m,1. 0m vertical height of the surface is most conducive to wind-resistant design,the conclusion can be shed some light on design of low-rise residential areas where typhoon occur frequently.

关 键 词：计算流体动力学 四坡低矮房屋 数值模拟 檐口 屋面风压 

分 类 号：TU312.1[建筑科学—结构工程]